Experimental and numerical analysis on heat transfer performance of slug flow in rectangular microchannel

Dongren Liu; Xiang Ling; Hao Peng; Juan Li; Luanfang Duan

doi:10.1016/j.ijheatmasstransfer.2019.118963

Experimental and numerical analysis on heat transfer performance of slug flow in rectangular microchannel

Dongren Liu, Xiang Ling, Hao Peng, Juan Li, Luanfang Duan

School of Mechanical and Power Engineering

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

In this work, experimental and numerical studies are carried out on gas-liquid two phase flow in rectangular microchannels. The effect of different parameters on heat transfer performance is studied. The results from experiment and simulations show that a higher wall heat flux will enhance the heat transfer performance but a higher inlet temperature difference ΔT between gas and liquid has a negative effect on Nusselt number. It should also be noticed that the Nusselt number will reach its maximum value when void fraction β (=Q_G/(Q_G + Q_L)) is in the range of 0.2–0.4, and then decreases gradually when β is from 0.4 to 0.9. Moreover, Capillary number Ca, superficial velocity U, liquid film thickness δ* also contribute to the heat transfer performance and behavior.

Original language	English
Article number	118963
Journal	International Journal of Heat and Mass Transfer
Volume	147
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2019.118963
State	Published - Feb 2020

Keywords

Heat transfer
Microchannel
Nusselt number
Slug flow
Taylor flow
Two phase

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10.1016/j.ijheatmasstransfer.2019.118963

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title = "Experimental and numerical analysis on heat transfer performance of slug flow in rectangular microchannel",

abstract = "In this work, experimental and numerical studies are carried out on gas-liquid two phase flow in rectangular microchannels. The effect of different parameters on heat transfer performance is studied. The results from experiment and simulations show that a higher wall heat flux will enhance the heat transfer performance but a higher inlet temperature difference ΔT between gas and liquid has a negative effect on Nusselt number. It should also be noticed that the Nusselt number will reach its maximum value when void fraction β (=QG/(QG + QL)) is in the range of 0.2–0.4, and then decreases gradually when β is from 0.4 to 0.9. Moreover, Capillary number Ca, superficial velocity U, liquid film thickness δ* also contribute to the heat transfer performance and behavior.",

keywords = "Heat transfer, Microchannel, Nusselt number, Slug flow, Taylor flow, Two phase",

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TY - JOUR

T1 - Experimental and numerical analysis on heat transfer performance of slug flow in rectangular microchannel

AU - Liu, Dongren

AU - Ling, Xiang

AU - Peng, Hao

AU - Li, Juan

AU - Duan, Luanfang

PY - 2020/2

Y1 - 2020/2

N2 - In this work, experimental and numerical studies are carried out on gas-liquid two phase flow in rectangular microchannels. The effect of different parameters on heat transfer performance is studied. The results from experiment and simulations show that a higher wall heat flux will enhance the heat transfer performance but a higher inlet temperature difference ΔT between gas and liquid has a negative effect on Nusselt number. It should also be noticed that the Nusselt number will reach its maximum value when void fraction β (=QG/(QG + QL)) is in the range of 0.2–0.4, and then decreases gradually when β is from 0.4 to 0.9. Moreover, Capillary number Ca, superficial velocity U, liquid film thickness δ* also contribute to the heat transfer performance and behavior.

AB - In this work, experimental and numerical studies are carried out on gas-liquid two phase flow in rectangular microchannels. The effect of different parameters on heat transfer performance is studied. The results from experiment and simulations show that a higher wall heat flux will enhance the heat transfer performance but a higher inlet temperature difference ΔT between gas and liquid has a negative effect on Nusselt number. It should also be noticed that the Nusselt number will reach its maximum value when void fraction β (=QG/(QG + QL)) is in the range of 0.2–0.4, and then decreases gradually when β is from 0.4 to 0.9. Moreover, Capillary number Ca, superficial velocity U, liquid film thickness δ* also contribute to the heat transfer performance and behavior.

KW - Heat transfer

KW - Microchannel

KW - Nusselt number

KW - Slug flow

KW - Taylor flow

KW - Two phase

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DO - 10.1016/j.ijheatmasstransfer.2019.118963

M3 - 文章

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SN - 0017-9310

VL - 147

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

M1 - 118963

ER -

Experimental and numerical analysis on heat transfer performance of slug flow in rectangular microchannel

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